Top 50 Bad Hosts & Networks Q4 2011

The final quarter of 2011 saw AS47583 Hosting Media move up to #1 Bad Host, having been well known in the Top 10 for some time. The Lithuanian-based host was found to be supporting some of the worst types of threats including several botnet-related activities such as Zeus as well as C&smp;C servers, exploit servers, phishing servers, malware and badware.

HostExploit analyzed all 39,796 publicly-advertised Autonomous Systems (including web hosts, commercial networks and registrars) with the results represented in a number of ways. Also included are features on the latest threats such as smartphone infections and the “Dirt Jumper” DDoS botnet.

We’ll be examining domains living on AS47583 and other Bad Hosts and adding them to our blocklist, but you should perform your own research and add them as appropriate.

“but there is still not a legitimate site in sight. Most of the bad sites are currently on 194.28.114.102 but you should block access to 194.28.112.0/22 (194.28.112.0 - 194.28.115.255) if you can, because this range of IP addresses is nothing but trouble.”